Andrew Goodwin proposed a theory about conventions in music videos. He suggested that music videos follow certain rules and codes to promote artists and make money for record companies. Goodwin's theory identified five main aspects necessary in music videos to help promote songs and artists: 1) narrative and performance, 2) use of the artist's image, 3) relating lyrics to visuals, 4) technical aspects of production, and 5) conveying the artist's interpretation of the song's "thought beats."